# SDR ASAA2017012119539

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 21, 2017
- Submitted: January 26, 2017
- Operation: Air carrier
- Aircraft: [N508AS](https://openairdocs.org/aircraft/N508AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35691
- Aircraft time: 32,447 hours, 9,786 cycles
- Engine: Cfmint CFM567B27
- System (JASC): [7510 · Engine Anti-Icing System](https://openairdocs.org/jasc/7510)
- Part: Anti-Ice Valve
- Part number: 32156184
- Part serial: 6410
- Condition: Failed
- Location: Nr 1 Engine
- Part time: 23,622 hours, 7,088 cycles
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2017012119539

## Discrepancy

NR 1 ENGINE COWL TAI LIGHT STAYING ON.  ACFT GROUNDED. REMOVED AND REPLACED THE NR 1 ENGINE COWL TAI VALVE, REF B737-800 AMM 30-21-11-400-801. INSTALLATION TEST FAILED. PRSOV WILL NOT STAY OPEN, COWL VALVE OPEN LIGHT DOES NOT DIM, REMAINS BRIGHT. REQUIRED FURTHER TROUBLESHOOTING, COMPLETED ENGINE COWL TAI VALVE INSTALLATION TEST, REF B737-800 AMM 30-21-11-400-801 PARAGRAPH I AND J. ALL TEST PASS, LEAK CHECK GOOD.

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